RU2760054C2 - Cleaning apparatus and method for cleaning a transport screw - Google Patents

Abstract

FIELD: cleaning.SUBSTANCE: cleaning apparatus (6) for cleaning the transport screw (2) of a screw conveyor (1) comprises a slide-like main part (7) for laying on at least two screw spirals (12b-12c) of the transport screw (3) in order to move the slide-like main part (7) in the axial direction (X) due to the rotational movement of the transport screw (3), as well as a cleaning tool (8) for cleaning the transport screw (3), placed on the slide-like main part (7).EFFECT: easy in operation apparatus with a good cleaning effect is provided.17 cl, 2 dwg

Description

The present invention relates to a cleaning device for cleaning a conveyor auger of a conveyor auger, and also relates to a conveyor auger with such a cleaning device. The present invention also relates to a method for cleaning the transport auger of a screw conveyor.

The cleaning of the transport auger, which is installed in the auger chute of the auger conveyor, can be carried out manually, for example using a high pressure cleaner. For this purpose, an operator platform for such a high pressure cleaner is usually required. Automated cleaning devices can also be used to clean the transport auger and / or auger chute, in which case the rotary motion of the transport auger is used to move the cleaning device axially along the transport auger.

DE 119247 C describes a device for cleaning the troughs of transport augers, which comprises a trolley suspended on a guide rail for movement, which is pivotally connected to a brush adjacent to the walls of the trough and with blades pressed against the auger ridges, when the auger rotates, it moves forward. The specified trolley is moved by means of rollers moving along the guide rail.

DE 4238730 C2 describes a device for cleaning the flanges of an auger, the auger being housed in a closed casing. The cleaning device contains cleaning elements for both sides of the auger blade in the form of scraper knives and moves both along the auger shaft and along the inner walls of the casing.

DE 9115174 U1 describes a device for cleaning screw conveyors, in which at least one cleaning element is located above the shaft of the conveyor auger, which moves by lifting a helix in the axial direction of the conveyor auger and enters between two turns of the conveyor auger.

An object of the present invention is to provide a cleaning device for cleaning a transport auger which is easy to handle and provides a good cleaning effect.

This problem is solved in a cleaning device for cleaning the transport auger of a conveyor auger, comprising a skid-shaped main part for placing on at least two ridges of the conveying auger, so that this skid-shaped main part is moved axially by the rotary movement of the conveying auger, and a cleaning device placed on a skid-shaped body for cleaning the transport auger.

The cleaning device according to the invention comprises a skid-shaped (hereinafter - skid-like) main part, which for cleaning the transport auger, as well as for cleaning the auger chute is pushed onto at least two usually axially adjacent ridges of one spiral of the transport auger. For this purpose, said sled-like body can have at least one flat contact surface on its underside. Said skid-like body usually has a low structural height and is so flat that it can even be used in a screw chute that forms a closed casing, i. E. in a screw chute, which does not have a removable cover on its upper side.

By such a skid-shaped body is meant a self-supporting, substantially solid body, which can have a weight of the order of, for example, more than about 10 kg or about 20 kg. The comparatively high dead weight stabilizes said skid-like body when moving along the transport auger, so that it is not necessary for this skid-like body to be guided further along the shaft of the conveyor auger, or only for this purpose and along the provided guide rail, as is the case in the above-described cleaning devices.

By means of a skid-like body, which is placed on at least two auger ridges, the area between the auger ridges under the conveyor auger shaft is also accessible for the cleaning device. Thus, with the aid of the cleaning device, together with the transport auger, the auger chute of the auger conveyor can also be cleaned. To clean the transport auger along its entire length, said main part, like a slide, moves axially along the transport auger due to the fact that this transport auger rotates around its longitudinal axis by means of a drive.

In one embodiment, said skid-like body has at least one abutment surface for placing on one side of the auger ridge of the transport auger. This contact surface improves the transfer of force from the transport auger to the skid-like body during the rotary movement of the transport auger. In the event that said skid-shaped body is to move in both directions along the transport auger - which is provided by the drive of the transport auger, the direction of rotation of which is reversible - on the skid-shaped body usually at least two contact surfaces are provided, which are brought into contact with opposite sides one or more combs of the auger.

In one preferred embodiment, said skid-like body has at least one recess into which at least one ridge of the transport auger is received. This recess is usually formed on the underside of the body. The recess can be formed, for example, between two flat abutment surfaces on the underside of the main body, serving to fit on two further ridges of the auger, which are axially adjacent in front of the said ridge of the auger, respectively, after the ridge of the auger entering the specified recess.

In one modification, this recess has an L-shaped geometry to grip the L-shaped end of the auger ridge. With a relatively long auger chute, it is usually necessary to provide one or more intermediate supports to support the transport auger in the auger chute. In order to minimize friction between the screw helix and the screw chute in the region of the intermediate bearing, the screw ridges located in the region of this intermediate bearing can have an L-shaped profile, in which a flat material extending in the axial direction is placed on the radially outside end of the screw ridge, so that a longitudinally L-shaped profile of the auger flanges provided in the area of the intermediate bearing of the auger flanges is obtained.

In another embodiment, said skid-like body has lateral guide surfaces for guiding in the auger chute of the transport auger. This skid-like body usually extends over the entire width of the auger chute in which the transport auger is mounted. For the lateral direction, said slide-like body can have, for example, two flat lateral guide surfaces that extend in a substantially vertical direction and for the lateral direction of the body are brought into abutment against the inner sides of the screw chute.

In another embodiment, the cleaning device comprises a body, in particular magnetically coded, for determining at least one axial end position of the slide-like body in the screw chute of the screw conveyor. Typically, said skid-like body at the first end of the screw chute, i. E. close to the first axial end position, is laid on the ridges of the transport auger and, by means of the transport auger drive, is axially moved to the other end of the auger chute, i.e. to the second axial end position in order to clean the transport auger along its entire length. This coded body can be placed on the slide-shaped body in order to determine the current axial position of the slide-shaped body in the screw chute with the aid of, in particular, proximity sensors. In the simplest case, said magnetically encoded body can be a permanent magnet body that can be detected by a magnetic position sensor.

Typically, one position sensor is mounted stationary at one end of the auger chute in order to detect, by means of said coding, that the sled body has reached this axial end position. This detection of the axial end position (s) serves to limit the cleaning path of the skid-like body in the screw chute. Such a non-contacting position transmitter can mean, for example, a magnetic position transmitter. An optical position sensor that detects optical encoding on the specified body can also be used. If necessary, the position sensor can be placed on a skid-shaped body and the body, for example magnetically coded, can be placed on the corresponding axial end of the screw chute. However, in such a case, an electrical cable connection to the skid base is usually required, which entails significant additional costs.

In another embodiment, the cleaning device is configured to introduce a cleaning medium into at least one intermediate space between two adjacent ridges of the auger on which said skid-like body is laid. A cleaning medium is generally understood to mean a fluid, i. E. liquid or gas. The liquid cleaning medium can be, for example, a cleaning liquid or a flushing liquid. The gas cleaning medium can be, for example, compressed air. The use of a gas as a cleaning medium is beneficial because it volatilizes and does not need to be removed as a liquid. The use of compressed air or inert gases as a cleaning medium makes it possible to remove the adhesion of the transported product from the transport auger and / or from the auger chute, and then continue to use this separated product. By introducing the cleaning medium only into the spaces between the auger ridges on which the said sled body is located, as opposed to cleaning with a high pressure cleaning device, the amount of cleaning medium required for cleaning can generally be reduced by at least about 20%.

In one modification of this embodiment, the cleaning device has at least one, in particular a rotating (precision) cleaning nozzle for only introducing a cleaning medium into said intermediate space. With this cleaning nozzle, a cleaning medium can be injected into this interstitial space. By using a rotating cleaning nozzle, the cleaning medium can be evenly distributed in this intermediate space. Alternatively, however, a fixed cleaning nozzle or a combination of one or more fixed and one or more rotating cleaning nozzles can also be used. In particular, a rotating cleaning nozzle can be used, which distributes the cleaning medium not only in one plane within an angle of 360 °, but, for example, through the use of two axes of rotation, also distributes it in the entire surrounding three-dimensional space. The cleaning nozzle (s) are usually spaced apart from the skid-shaped body with a spacer element (s) and exit into the intermediate space between the auger flanges. Such a cleaning nozzle (s) can / can in particular be designed to inject into the intermediate space both a cleaning medium in the form of a liquid and a cleaning medium in the form of a gas.

In one preferred modification of this embodiment, the cleaning device has at least two cleaning nozzles, which are located at different distances from the sled body to supply cleaning medium to different sides of the screw shaft. Thanks to the use of at least two rotating cleaning nozzles, which are offset relative to each other, cleaning can be carried out without a "shadow area", so that the area that, using one cleaning nozzle, would be covered by the auger shaft, can be covered by cleaning. Two or more cleaning nozzles can be offset relative to each other also in the axial direction. In such a case, two or more cleaning nozzles for introducing the cleaning medium can be inserted into two or more spaces between different adjacent auger ridges.

In a further modification, at least one supply channel is formed in the skid-shaped body part for supplying a cleaning medium to at least one cleaning nozzle. This supply channel, respectively, the supply channels in the main part can flow into the spacer elements of the tubular shape, on which the said cleaning nozzles are located. The cleaning medium can be supplied to the cleaning nozzles via the supply channels and spacers. The supply channel can have a connection element at one end for a supply device for supplying a cleaning medium to the skid-shaped body.

In another embodiment, the cleaning device includes a flow meter for measuring the flow rate of the cleaning medium placed in the intermediate space. The flow meter can be used, in particular, as a flow switch, so that it can be known whether the desired flow rate of the cleaning medium has been reached. If this is not the case, then this indicates a clogged cleaning nozzles or other structural elements through which the cleaning medium flows. The cleaning device can then be checked and, if necessary, cleaned.

In a further modification, said cleaning device comprises a supply device, in particular a hose, for supplying a cleaning medium to the sled body. The cleaning medium can be supplied to the sled body, for example via a hose, as in a high pressure cleaning device. This hose can be provided, for example, by means of a spring-actuated or pneumatically operated hose reel, which ensures a controlled winding of the hose and thus matching the length of the hose depending on the axial position of the sled body in the auger chute. A holding device can be placed on the inside of the auger chute to secure the hose.

A further aspect of the invention relates to an auger conveyor comprising: a transport auger, an auger chute in which the transport auger is installed, a drive for rotating the transport auger, and a cleaning device, which is configured as described above. As mentioned above, to clean the transport auger and the auger chute, said skid-like body is placed on at least two ridges of the transport auger and is driven axially along the transport auger by means of a drive. In order to drain the (liquid) cleaning medium from the auger chute of the transport auger, the auger chute can be oriented obliquely at an angle typically of about 1 ° or more relative to the horizontal. For this purpose, the screw chute can be mounted, for example, on a floor stand or the like.

In one embodiment, the auger chute has a holding device on its inner side for fixing a hose for supplying a cleaning medium to a sled body. The holding device may have a plurality of fixing elements, for example in the form of open lugs located on the inside of the auger chute, which are welded to the auger chute or otherwise attached to the auger chute. Preferably, said holding device or said holding elements are located on the inner side of the screw chute above the overflow edge located in the screw channel in order to reduce the risk that the product conveyed by the transport auger settles on the holding device or on the locking elements.

In another embodiment, at least one end of the screw chute is arranged, in particular, a magnetic position sensor, in order to detect that the skid-shaped body has reached one axial end position in the screw chute. As described above, for this purpose, said magnetic coding (or other type of coding) of the body integrated in the sled body can be detected. Instead of a magnetic position sensor, another type of position sensor can be used, for example, an optical position sensor.

This invention also relates to a method for cleaning the transport auger of a conveyor auger, which has been described above, including the following steps: placing the skid-like body on at least two ridges of the transport auger, cleaning the transport auger by introducing a cleaning medium into the intermediate space between at least two from the ridges of the auger, as well as (simultaneous) movement of the skid-shaped body in the axial direction of the transport auger by rotating the transport auger by means of the drive. Typically, said skid-like body at one end of the auger is pushed onto the ridges of the transport auger and moves along the entire length of the transport auger all the way to the other end of the auger to clean the entire transport auger. The laying of the sled body can be carried out manually, however, it is also possible that the laying is carried out automatically, for example by a robot, a swing arm or the like. With the auger chute open at the top, the sliding body can be laid directly from the top of the auger chute. With the auger chute closed, said skid-like body can be inserted laterally into the auger chute and then lowered.

One variant of this method includes the following steps: detecting the achievement of the axial end position of the slide-shaped body in the screw chute, as well as changing the direction of rotation of the drive for axial movement of the slide-shaped body in the opposite direction in the screw chute, and preferably upon detecting the achievement of this axial end position, the cleaning cleaning device environment. If the axial end position is detected by the above-described position sensor, the direction of rotation of the actuator can be reversed to move the slide-like body in the opposite direction. Such a reversal of the direction of rotation of the drive can be easily realized, in particular with a variable frequency drive. Said skid-like body is then usually moved to the other end of the auger chute so that there it can be removed from the auger chute. Alternatively, said sled-like body can be moved multiple times between both end positions for cleaning. When said sled body is in one end position and the direction of rotation is changed, the cleaning medium can also be changed. For example, when moving forward, the cleaning device can be rinsed with clean water or compressed air, and during the reverse movement it can be filled with foam of the cleaning medium, and again during the forward movement it can be rinsed with water, and during the reverse movement it can be disinfected, during the forward movement and, if necessary, during the reverse movement, it can be additionally rinsed. , etc. When the main body moves back to the axial end of the auger chute, in which it was mounted on the transport auger, the length of the hose that serves to supply the cleaning medium is also reduced, so that it can be removed together with the main part from the auger chute without having to disconnect connection of the hose to the main body or to the hose reel.

Other advantages of the invention will be apparent from the description and the drawings. The features that were discussed above and which will be discussed below can be used both by themselves and in any combination with each other. The shown and described embodiments are not to be understood as a complete listing, they are merely exemplary to characterize the invention.

The drawings show the following:

Fig. 1 is a schematic representation of a screw conveyor with a cleaning device, which contains a skid-like main part, in longitudinal section, and also

Fig. 2 is a schematic cross-sectional view of the screw conveyor of Fig. 1.

1 and 2 show a screw conveyor 1 containing a screw chute 2 in which a transport auger 3 is installed. The screw conveyor 1 has a drive 4 in order to rotate the transport auger 3 about its longitudinal axis 5 as shown by the arrow in FIG .2. The screw conveyor 1 also has a cleaning device 6 containing a skid-shaped body 7, as well as a cleaning device 8 with two cleaning nozzles 9a, 9b, which is placed on a skid-shaped body 7.

The transport auger 3 has a screw shaft 10 with a helical helix 11 with a plurality of screw ridges 12a-12e. In Fig. 1, for simplicity, only five screw ridges 12a-12e are shown. As can be seen in FIG. 1, said skid-like body 7 rests on three axially successive one after the other, i. E. along the longitudinal axis 5 of the transport auger 3 the ridges 12b-12d of the screw of the helical line 11 of the screw. Said skid-shaped body 7 can be moved along the longitudinal axis 5 of the transport auger 3 due to the fact that the drive 4 of the screw conveyor 1 is activated to rotate the transport auger 3 about the longitudinal axis 5.

In order to stabilize the skid-shaped body 7 when moving along the longitudinal axis 5 of the transport auger 3, in addition to a relatively large weight of the order of about 10 kg, 20 kg or more, it has a recess 13, which includes the middle ridge 12c of the transport auger 3. As can be seen in FIG. , the recess 13 in the longitudinal direction has an L-shaped profile, respectively, an L-shaped geometry. This recess 13 is matched with the not clearly illustrated L-shaped profile of the radially outside end of the middle ridge 12c of the auger, which is used in the area of the intermediate support of the transport auger 3 in the auger chute 2 in order to reduce friction with the rod-shaped support elements 15.

The recess 13 has two vertically extending abutment surfaces 14a, 14b, which abut the opposite sides of the middle ridge 12c of the auger and improve the transfer of force to the skid-shaped body 7 when moving along the longitudinal axis 5 of the transport auger 3. To stabilize the skid-shaped body 7 during movement, it has the side guide surfaces 16a, 16b shown in FIG. 2, which are oriented in parallel and which bear against the vertically extending inner walls of the screw chute 2.

To clean the auger chute 2, as well as the transport auger 3, through both cleaning nozzles 9a, 9b, the cleaning medium 17 is introduced both into the intermediate space between the first and second ridges 12b, 12c of the auger, and between the second and third ridges 12c, 12d of the auger, on which is placed the said skid-shaped body 7. In the case of the cleaning nozzles 9a, 9b we are talking about rotary cleaning nozzles 9a, 9b, which distribute the cleaning medium 17 in all directions, as shown in Fig. 1 and Fig. 2 by means of lines extending from the center of the corresponding cleaning nozzle 9a, 9b.

In order to ensure that the ridges 12a-12e of the auger can be cleaned completely, it is necessary that the cleaning medium 17 be able to enter any location in the said interstices. To ensure this, the first cleaning nozzle 9a and the second cleaning nozzle 9b in the vertical direction Z are at different distances from the skid-shaped body 7. The corresponding distance in the vertical direction Z is chosen such that the first cleaning nozzle 9a is located above the auger shaft 10, while the second cleaning the nozzle 9b is located under the auger shaft 10. Additionally, the two cleaning nozzles 9a, 9b are offset relative to each other in the longitudinal direction of the transport auger 3, i.e. in the X direction as well as in the Y direction. Due to the offset arrangement of the cleaning nozzles 9a, 9b, it is possible to avoid the "shadow area" during cleaning, which could be caused by the auger shaft 10 when using only a single cleaning nozzle.

For supplying the cleaning medium 17 to the cleaning nozzles 9a, 9b, said skid-shaped body 7 comprises an inlet 18 that branches out from the connection for the hose-shaped inlet 19 to supply the cleaning medium 17 to both cleaning nozzles 9a, 9b. Figure 1 shows only one end of the hose 19, on which this hose is connected to the supply channel 18. The hose 19 leads to a holding device, which in the example shown is formed by fixing elements in the form of lugs 20a, 20b, ..., which are located on the inner side of the auger chute 2 and which form a horizontal guide for the hose 19. The lugs 20a, 20b, ... are open at the top and serve to lay the hose 19 when moving in the longitudinal direction 5 of the transport auger 3. The hose 19 is delivered by means of a hose reel not shown in the drawings with spring driven or pneumatically driven.

The lugs 20a, 20b are formed on one side of the auger chute 2, on which an overflow edge 21 shown in FIG. 2 is provided, which is to prevent the product transported by means of the transport auger 3 from being dragged outwardly upward through this overflow edge 21. Lugs 20a, 20b placed on the inner side of the auger chute 2 above the overflow edge 21 in order to prevent it from being contaminated with the product conveyed by the transport auger 3. For the removal of the cleaning medium 17, it is preferable if the auger chute 2 has a slight inclination, i. e. if the auger chute 2 is inclined at an angle usually greater than about 1 ° with respect to the horizontal, which, for example, can be provided by means of a floor stand.

In the skid-shaped body 7, a magnetically encoded body 22, schematically shown in FIG. 2, is formed, which enables contactless measurement of the position of the skid-shaped body 7 in the longitudinal direction 5 of the transport auger 3 (i.e. in the X direction). The body 22 is made of a material with permanent magnets, and this makes it possible, in particular, to recognize when the said slide-like body 7 has reached one of both ends of the screw chute 2, i.e. when said sled body 7 has reached one of both axial end positions 23a, 23b. For this recognition, in the example shown, magnetic position sensors 24a, 24b are stationary located at both axial ends of the auger chute 2, which detect the reaching of said sled base 7 of the corresponding axial end position 23a, 23b by using magnetic coding of the body 22. With this kind of sensors position and a suitable control device, the cleaning path of the skid-shaped body 7 may be limited.

If said skid-shaped body 7 is placed on the first, for example, the lower end of the screw chute 2 on the ridges of the auger located there, and it is detected by means of the body 22 that said skid-shaped body 7 has reached the second, for example, the upper end of the auger chute 2, then said skid the main part 7 can be lifted by the second end from the transport auger 3, and the cleaning process is completed. With the auger chute 2 open at the top, the hose 19 can also be removed from the auger chute 2 when the skid-shaped body 7 is removed, and its length can be reduced by means of a hose reel. Subsequently, said skid-like body 7 can again at the lower end of the screw chute 2 be placed on the ridges of the screw located there in order to carry out the next cleaning step.

In the event that the drive 4 of the screw conveyor 1 is capable of reversing the direction of rotation, upon detection or after the detection of the second, upper end position 23b, the direction of rotation of the conveyor auger 3 can be reversed, so that said slide-like body 7 can be moved in the opposite direction in the screw chute 2 until it again reaches the first, lower end position 23a. By changing the direction of rotation of the transport screw 3, the cleaning medium can be changed. Thus, for example, in the first cleaning step, a cleaning medium in the form of a flushing medium, such as pure water or compressed air, can be used in the forward movement of the sled body 7, while in the return movement, a cleaning medium in the form of cleaning foam is used, and etc. Both the laying of the skid-shaped body 7 and its extraction from the transport auger 3 can be carried out manually or automatically, for example using a pneumatically driven lifting arm, a robot arm or the like.

To measure the flow rate of the cleaning medium 17 introduced into the respective intermediate spaces between the ridges 12a-12e of the auger, said skid-shaped body 7 has a flow meter 25 on the inlet 18. whether the cleaning nozzles 9a, 9b, the supply channel 18 formed in the skid-shaped body 7, or the hose 19, if necessary, are partially clogged with impurities due to the product transported by the screw conveyor 1 (for example, sausage meat or the like) so that the flow rate is reduced ... If necessary, it is possible, upon detection of a decrease in the flow rate, to increase the cleaning duration or, accordingly, additional cleaning steps can be carried out in order to clean the transport auger 3 of the screw conveyor 1.

Claims (27)

1. A cleaning device (6) for cleaning the transport auger (2) of the auger conveyor (1), containing a skid-like body (7) for placing on at least two spirals (12b-12c) of the transport auger (3) in order to move this skid-like body (7) in the axial direction (X) due to the rotational movement of the transport auger (3 ), as well as a cleaning device (8) placed on the skid-shaped base part (7) for cleaning the transport auger (3). 2. An apparatus according to claim 1, wherein said skid-shaped body (7) comprises at least one abutment surface (14a, 14b) for laying on one side of the ridge (12c) of the transport auger (3). 3. A device according to claim 2, wherein said skid-shaped body (7) has at least one recess (13) into which at least one ridge (12c) of the transport auger (3) engages. 4. A device according to claim. 3, in which the recess (13) for the entry of the L-shaped end of the ridge (12c) of the screw has an L-shaped geometry. 5. A device according to any one of the preceding claims, in which said skid-shaped body (7) has lateral guide surfaces (16a, 16b) for guiding in the auger chute (2) of the transport auger (3). 6. A device according to any of the preceding claims, further comprising a body (22), in particular magnetically coded, for determining at least one axial end position (23a, 23b) of a skid-like body (7) in a screw chute (2) of a screw conveyor (1). 7. A device according to any one of the preceding claims, in which a cleaning device (8) is formed for introducing a cleaning medium (17) into at least one intermediate space between two adjacent ridges (12b, 12c; 12c, 12d) of the auger. 8. A device according to claim 7, wherein the cleaning device (8) for introducing a cleaning medium (17) into the intermediate space has at least one, in particular a rotating cleaning nozzle (9a, 9b). 9. The device according to claim 8, in which the cleaning device (8) comprises at least two cleaning nozzles (9a, 9b), which for supplying the cleaning medium (17) to different sides of the screw shaft (10) are located at different distances from the slide the main part (7). 10. A device according to claim 8 or 9, in which at least one supply channel (18) is formed in the skid-shaped body (7) for supplying a cleaning medium (17) to at least one cleaning nozzle (9a, 9b). 11. Device according to any one of paragraphs. 7-10, additionally containing a flow meter (25) for measuring the flow rate of the cleaning medium (17) introduced into the intermediate space. 12. Device according to any one of paragraphs. 7-11, further comprising a supply device, in particular a hose (19), for supplying the cleaning medium (17) to the skid-shaped body (7). 13. Screw conveyor (1) containing transport auger (3), the auger chute (2) in which this transport auger (3) is installed, a drive (4) for driving the transport auger (3) in rotation, and cleaning device (6) according to any of the preceding claims. 14. Auger conveyor according to claim 13, in which the auger chute (2) has a holding device (20a, 20b, ...) on its inner side for fixing the hose (19) for supplying the cleaning medium (17) to the skid-shaped body ( 7). 15. Auger conveyor according to claim 13 or 14, in which at least one end of the auger chute (2) is located, in particular, a magnetic position sensor (24a, 24b) for detecting the achievement of one axial end position (23a, 23b) of the slide the main part (7) in the screw chute (2). 16. A method for cleaning the transport auger (3) of the auger conveyor (1) according to claim 13 or 14, including placing the skid-shaped body (7) on at least two ridges (12b-12d) of the transport auger (3), cleaning the transport auger (3) by introducing a cleaning medium (17) into the intermediate space between at least two of the ridges (12b, 12c; 12c, 12d) of the auger, and moving the skid-shaped body (7) in the axial direction (X) of the transport auger (3) by rotating the transport auger (3) by means of the drive (4). 17. The method of claim 16, further comprising detection of reaching one axial end position (23a, 23b) of the skid-shaped body (7) in the screw chute (2), and changing the direction of rotation of the drive (4) for axial movement of the skid-shaped body (7) in the opposite direction in the screw chute (3), and preferably upon detection of reaching this axial end position (23a, 23b), the cleaning medium (17) is replaced.

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